"The Walking Dead" (9 p.m., AMC): And they thought that flu virus was wretched. As the zombie sensation reaches its midseason finale, the prison survivors face an old enemy when the psycho Governor (David Morrissey) resurfaces in their lives.

"Christmas in Conway" (9 p.m., ABC): This new holiday film has a man (Andy Garcia) trying to build a Ferris wheel in the backyard for his ailing wife (Mary-Louise Parker) as a reminder of the night he proposed. Too bad their neighbor is a major grinch.

"Return to Downton Abbey" (9 p.m., PBS): Susan Sarandon hosts this program for fans who just can't get enough of the British soap. It recalls memorable moments from past seasons and offers a tantalizing taste of what lies ahead in Season 4.